Think You Have It Figured Out? 

Follow  This  Printable  "Techie  Check  List"  To  Make  Sure  That  Your  Water  Bottle  Session  Goes  Smoothly

Adjusted the pH for storage.

Placed the samples in the refrigerator for preservation.

Readjusted the pH for experimentation.

Emptied the water bottles after the test was completed.

Rinsed out the empty water bottles, dried them with paper towels, and placed them in the dishwasher.